TY - JOUR
T1 - Performance analysis of a refrigerant extracting twin screw compressor employed in multi-temperature heat pump systems
AU - Zhao, Zhaorui
AU - Tian, Yafen
AU - Hou, Feng
AU - Xing, Ziwen
N1 - Publisher Copyright:
© 2016 Elsevier Ltd. and IIR. All rights reserved.
PY - 2016/7/1
Y1 - 2016/7/1
N2 - Heat pump systems are widely used in heat recovery applications where high temperature waste heat is abundantly available. High temperature heat pumps are capable of recovering heat from the condenser of a refrigeration system to supply heat for processing or heating. However, conventional systems are unable to supply heat at more than one temperature level, while significant efficiency loss is caused by the large condensing temperature difference between high and mid temperature condensers. In this paper, a novel type of refrigerant extracting screw compressor and a modified system is designed. Mathematical models are formulated for the working process and performance prediction. Therefore, the pressure of refrigerant within the compressing chamber and the COP of the heat recovery multi-temperature heat pump system are calculated. Furthermore, the influence of the internal volumetric ratio, operating condition, properties of refrigerant extraction and mid-stage condensing temperature on the performance are discussed.
AB - Heat pump systems are widely used in heat recovery applications where high temperature waste heat is abundantly available. High temperature heat pumps are capable of recovering heat from the condenser of a refrigeration system to supply heat for processing or heating. However, conventional systems are unable to supply heat at more than one temperature level, while significant efficiency loss is caused by the large condensing temperature difference between high and mid temperature condensers. In this paper, a novel type of refrigerant extracting screw compressor and a modified system is designed. Mathematical models are formulated for the working process and performance prediction. Therefore, the pressure of refrigerant within the compressing chamber and the COP of the heat recovery multi-temperature heat pump system are calculated. Furthermore, the influence of the internal volumetric ratio, operating condition, properties of refrigerant extraction and mid-stage condensing temperature on the performance are discussed.
KW - Heat pump
KW - Multi-temperature
KW - Refrigerant extraction
KW - Twin screw compressor
UR - https://www.scopus.com/pages/publications/84966417149
U2 - 10.1016/j.ijrefrig.2016.04.015
DO - 10.1016/j.ijrefrig.2016.04.015
M3 - 文章
AN - SCOPUS:84966417149
SN - 0140-7007
VL - 67
SP - 383
EP - 394
JO - International Journal of Refrigeration
JF - International Journal of Refrigeration
ER -